void
OpenGL::SetupContext()
{
#if defined(HAVE_EGL) && defined(ANDROID)
egl = EGLInit();
#endif
texture_non_power_of_two = SupportsNonPowerOfTwoTextures();
#ifdef ANDROID
native_view->SetTexturePowerOfTwo(texture_non_power_of_two);
vertex_buffer_object = EnableVBO();
#endif
frame_buffer_object = CheckFBO() && FBO::Initialise();
if (frame_buffer_object) {
render_buffer_depth_stencil = CheckDepthStencil();
render_buffer_stencil = CheckStencil();
if (!render_buffer_stencil)
/* fall back to a packed depth+stencil format */
render_buffer_stencil = render_buffer_depth_stencil;
}
glDisable(GL_DEPTH_TEST);
glDisable(GL_DITHER);
glDisable(GL_LIGHTING);
glEnableClientState(GL_VERTEX_ARRAY);
InitShapes();
}
/*-----------------------------------------------------------------------------
* Main Function
* Initiates the graphics buffer, creates the window
*-----------------------------------------------------------------------------*/
int main( int argc, char *argv[] )
{
/* Seed the random number generator */
srand(time(0));
/* Initialize the drawing environment */
glutInit( &argc, argv );
/* Initialize the display mode */
glutInitDisplayMode ( GLUT_DOUBLE | GLUT_MULTISAMPLE );
/* Create an application window of a certain size */
glutInitWindowSize( 850, 450 );
/* Create an application window on the screen */
glutCreateWindow( "Assignment #3: 2D Transformations" );
/* Register the function that does drawing */
glutDisplayFunc( Draw );
/* Create the Keyboard callback */
glutKeyboardFunc( Keyboard );
/* Create the Mouse callbacks */
glutMouseFunc( Mouse );
glutMotionFunc( MouseMove );
/* Create the Reshape callback */
glutReshapeFunc( Reshape );
/* Enable GL Properties */
glEnable(GL_MULTISAMPLE);
/* Register Exit Handler */
atexit(ClearMemory);
/* Initialize the House Shapes */
InitShapes( );
/* Add the transform */
tlLevel.root = NULL;
tlSelectedTransforms.root = NULL;
tlAvailableTransforms.root = NULL;
/* Open the file */
file = fopen("level.dat", "r");
ReadLevel(file, currentLevelString);
/* Turn over control to OpenGL */
glutMainLoop();
return( 0 ); /* NOTE: this is here only for ANSI requirements */
}
void
OpenGL::SetupContext()
{
#if defined(HAVE_DYNAMIC_EGL)
egl = EGLInit();
#endif
texture_non_power_of_two = SupportsNonPowerOfTwoTextures();
#ifdef HAVE_OES_DRAW_TEXTURE
oes_draw_texture = CheckOESDrawTexture();
#endif
#ifdef ANDROID
native_view->SetTexturePowerOfTwo(texture_non_power_of_two);
vertex_buffer_object = EnableVBO();
#endif
#ifdef HAVE_OES_MAPBUFFER
mapbuffer = IsExtensionSupported("GL_OES_mapbuffer");
#endif
#ifdef HAVE_DYNAMIC_MAPBUFFER
if (mapbuffer) {
GLExt::map_buffer = (PFNGLMAPBUFFEROESPROC)
eglGetProcAddress("glMapBufferOES");
GLExt::unmap_buffer = (PFNGLUNMAPBUFFEROESPROC)
eglGetProcAddress("glUnmapBufferOES");
if (GLExt::map_buffer == nullptr || GLExt::unmap_buffer == nullptr)
mapbuffer = false;
}
#endif
#ifdef HAVE_DYNAMIC_MULTI_DRAW_ARRAYS
if (IsExtensionSupported("GL_EXT_multi_draw_arrays")) {
GLExt::multi_draw_arrays = (PFNGLMULTIDRAWARRAYSEXTPROC)
dlsym(RTLD_DEFAULT, "glMultiDrawArraysEXT");
GLExt::multi_draw_elements = (PFNGLMULTIDRAWELEMENTSEXTPROC)
dlsym(RTLD_DEFAULT, "glMultiDrawElementsEXT");
} else {
GLExt::multi_draw_arrays = nullptr;
GLExt::multi_draw_elements = nullptr;
}
#endif
frame_buffer_object = CheckFBO() && FBO::Initialise();
if (frame_buffer_object) {
render_buffer_depth_stencil = CheckDepthStencil();
render_buffer_stencil = CheckStencil();
if (!render_buffer_stencil)
/* fall back to a packed depth+stencil format */
render_buffer_stencil = render_buffer_depth_stencil;
}
GLfloat lineWidthRange[2] = {0.0f, 0.0f};
glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, lineWidthRange);
max_line_width = lineWidthRange[1];
glDisable(GL_DEPTH_TEST);
glDisable(GL_DITHER);
#ifndef HAVE_GLES2
glDisable(GL_LIGHTING);
#endif
#ifndef USE_GLSL
glEnableClientState(GL_VERTEX_ARRAY);
#endif
InitShapes();
#ifdef USE_GLSL
InitShaders();
#endif
#ifndef HAVE_GLES
::glGetIntegerv(GL_MAX_ATTRIB_STACK_DEPTH, &max_attrib_stack_depth);
#endif
}
